A two-color injection mold

Abstract

The utility model relates to the technical field of two-color injection molding, and provides a two-color injection mold, comprising: a fixed mold component; a movable mold component, which is engaged with the fixed mold component to form a first cavity and a second cavity; a blocking rod, one end of which is movably inserted in a circulation channel between the first cavity and the second cavity; a feeding component, which is arranged on the fixed mold component; after the fixed mold component and the movable mold component are molded together, the blocking rod is inserted in the circulation channel, the feeding component first supplies the injection molding material of the first color to the first cavity, then, the blocking rod is removed in the circulation channel, the first cavity is connected with the second cavity, and the feeding component then supplies the injection molding material of the second color into the second cavity and seamlessly connects with the first part in the first cavity, the first part and the second part are seamlessly integrated in the product, and integrated molding is realized. The two-color injection mold in this scheme not only has a simple structural design, but also does not require physical rotation or displacement of the mold in the injection molding process.

Description

Technical Field

[0001] The utility model relates to the technical field of double-color injection molding, in particular to a double-color injection molding mold. Background Art

[0002] Two-color injection molding technology is an advanced molding process in the plastic manufacturing industry. It allows two different plastic materials to be fused in one product through two injection steps on the same dedicated two-color injection molding machine, and only one demoulding is required in the end. This process is also called two-material injection molding, and its core lies in the use of specially designed mold structures to achieve layered injection and precise joining of materials.

[0003] In the prior art, when a product is subjected to two-color injection molding, it is usually necessary to inject the first color of injection material into the mold cavity to form the basic structure or the first layer of the product. After the first layer of injection molding is completed, depending on the mold design, the position is changed through internal mechanical devices such as automatic rotation (for rotary machines), sliders or other mechanisms so that the first layer of material faces the second injection unit. This two-color injection mold requires more sophisticated engineering design and higher manufacturing precision, which often leads to increased costs. At the same time, due to its complex conversion mechanism, such as rotation or sliding, it affects the production speed to a certain extent. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a double-color injection mold in view of the current status of the prior art.

[0005] The technical solution adopted by the utility model to solve the above technical problems is: a two-color injection mold is provided for two-color injection molding of a product, the product having a first part and a second part, the first part and the second part are integrally formed, and the two-color injection mold comprises:

[0006] Fixed mold assembly;

[0007] A movable mold assembly, which is engaged with the fixed mold assembly to form a first cavity and a second cavity, wherein the first cavity is used to form the first part, and the second cavity is used to form the second part;

[0008] a blocking rod movably arranged on the movable mold assembly, a flow channel being arranged between the first cavity and the second cavity, one end of the blocking rod being movably inserted in the flow channel, the first cavity and the second cavity being isolated from each other by the blocking rod being inserted in the flow channel, and being able to flow with each other by the blocking rod leaving the flow channel;

[0009] A feeding assembly is arranged on the fixed mold assembly and is used for allowing the two-color injection molding material to enter the first cavity and the second cavity in a preset order.

[0010] In the above-mentioned two-color injection mold, the movable mold component is also provided with:

[0011] A first movable seat is movably arranged on the movable mold assembly, a plurality of the blocking rods are connected to a hanging platform on the first movable seat, and one end of each blocking rod away from the first movable seat is movably inserted into one of the flow channels, and the first movable seat is used to drive the blocking rod to move;

[0012] A driving member, wherein the movable mold assembly is provided with a plurality of the driving members, and the output ends of the driving members are all connected to the first movable seat, so as to drive the first movable seat to move;

[0013] A first elastic member, wherein a plurality of the first elastic members are arranged on the movable mold assembly, one end of each of the first elastic members abuts against the movable mold assembly, and the other end abuts against a side of the first movable seat away from the driving member.

[0014] In the above-mentioned two-color injection mold, a first push plate is also provided on the fixed mold assembly, which is threadedly connected to the fixed mold assembly through equal-height bolts. The first push plate movably abuts against the molded product to push the molded product away from the fixed mold assembly.

[0015] In the above-mentioned two-color injection mold, a plurality of installation grooves are further provided on the fixed mold assembly, and a second elastic member is provided in each of the installation grooves. One end of the second elastic member abuts against the inner wall of the installation groove, and the other end abuts against the side of the first push plate away from the molded product. The second elastic member can be compressed and elastically deformed due to the engagement of the fixed mold assembly with the movable mold assembly, and the elastic deformation can be restored due to the separation of the fixed mold assembly from the movable mold assembly, so as to drive the first push plate to move.

[0016] In the above-mentioned two-color injection mold, an ejector assembly is provided on the movable mold assembly for ejecting the molded product from the movable mold assembly.

[0017] In the above-mentioned two-color injection mold, the ejector assembly includes:

[0018] A second push plate, which is movably disposed in the movable mold assembly;

[0019] A second movable seat, which is movably disposed on the movable mold assembly and abuts against the molded product, and is used to drive the product to move;

[0020] A plurality of push rods are inserted on the second push plate, and one end of each push rod away from the second push plate is inserted on the second moving seat to drive the second moving seat to move.

[0021] In the above-mentioned two-color injection mold, the feed assembly includes:

[0022] A hot runner, which is arranged in the fixed mold assembly and is used to heat the injection material;

[0023] A first feed port, which is arranged on the end surface of the fixed mold assembly, wherein a first material channel is arranged in the hot runner, wherein one end of the first material channel is connected to the first feed port, and the other end of the first material channel is connected to the first cavity;

[0024] A second feed port is arranged on the side of the fixed mold assembly and does not interfere with the first feed port. A second feed channel independent of the first feed channel is arranged in the hot runner, one end of the second feed channel is connected to the second feed port, and the other end of the second feed channel is connected to the second cavity.

[0025] Compared with the prior art, the advantage of the utility model lies in that a circulation channel is set between the first cavity and the second cavity, one end of the blocking rod is movably inserted in the circulation channel, and when the fixed mold assembly and the movable mold assembly are engaged, the blocking rod is inserted in the circulation channel to ensure that the first cavity and the second cavity are isolated from each other. The feeding assembly first supplies the injection molding material of the first color to the first cavity to complete the molding of the first part of the product. Subsequently, the blocking rod is removed in the circulation channel to connect the first cavity with the second cavity, and the feeding assembly then supplies the injection molding material of the second color into the second cavity and seamlessly connects with the first part in the first cavity. In this way, the first part composed of the injection molding material of the first color and the second part composed of the injection molding material of the second color are seamlessly integrated in the product to achieve integrated molding. The two-color injection mold in this scheme not only reduces the mold manufacturing cost due to its simple structural design, but also does not require physical rotation or displacement of the mold during the injection molding process, greatly improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a three-dimensional diagram of the product in this solution.

[0027] Figure 2 It is a three-dimensional diagram of this scheme.

[0028] Figure 3 This is the floor plan of this plan.

[0029] Figure 4 yes Figure 3 Sectional view of AA.

[0030] Figure 5 It is a three-dimensional diagram of some structures on the movable mold component in this scheme.

[0031] Figure 6 It is a plan view of the fixed mold assembly in this scheme.

[0032] Figure 7 yes Figure 6 Cross-sectional view of BB.

[0033] Figure 8 It is a three-dimensional diagram of some structures on the fixed mold assembly in this scheme.

[0034] In the figure, 1, product; 2, first part; 3, second part; 4, fixed mold assembly; 5, movable mold assembly; 6, first cavity; 7, second cavity; 8, blocking rod; 9, first movable seat; 10, driving member; 11, first elastic member; 12, first push plate; 13, equal height bolts; 14, mounting groove; 15, second push plate; 16, second movable seat; 17, ejector rod; 18, hot runner; 19, first feed port; 20, second feed port. DETAILED DESCRIPTION

[0035] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0036] like Figures 1 to 8 As shown, a two-color injection mold of the utility model is used for two-color injection molding of a product 1, the product 1 has a first part 2 and a second part 3, the first part 2 and the second part 3 are integrally formed, and the two-color injection mold includes:

[0037] A fixed mold assembly 4; a movable mold assembly 5, which is engaged with the fixed mold assembly 4 to form a first cavity 6 and a second cavity 7, the first cavity 6 is used to form the first part 2, and the second cavity 7 is used to form the second part 3; a blocking rod 8, which is movably arranged on the movable mold assembly 5, a circulation channel is arranged between the first cavity 6 and the second cavity 7, one end of the blocking rod 8 is movably inserted in the circulation channel, the first cavity 6 and the second cavity 7 can be isolated from each other due to the blocking rod 8 being inserted in the circulation channel, and can circulate with each other due to the blocking rod 8 leaving the circulation channel; a feeding assembly, which is arranged on the fixed mold assembly 4, and is used to supply the two-color injection molding material to enter the first cavity 6 and the second cavity 7 in a preset order.

[0038] The operation process of the two-color injection mold in this scheme is as follows: after the fixed mold component 4 and the movable mold component 5 are molded, a first cavity 6 and a second cavity 7 are formed; at this time, the blocking rod 8 is inserted in the circulation channel to ensure that the first cavity 6 and the second cavity 7 are isolated from each other, and the feeding component first supplies the injection molding material of the first color to the first cavity 6 to complete the molding of the first part 2 of the product 1. Then, the blocking rod 8 is removed in the circulation channel to connect the first cavity 6 with the second cavity 7, and the feeding component then supplies the injection molding material of the second color into the second cavity 7 and seamlessly connects with the first part 2 in the first cavity 6. In this way, the first part 2 composed of the first color injection molding material and the second part 3 composed of the second color injection molding material are seamlessly integrated in the product 1 to achieve integrated molding. The two-color injection mold in this scheme not only reduces the mold manufacturing cost due to its simple structural design, but also does not require physical rotation or displacement of the mold during the injection molding process, greatly improving production efficiency.

[0039] Furthermore, the movable mold assembly 5 is also provided with: a first movable seat 9, which is movably arranged on the movable mold assembly 5, and a plurality of blocking rods 8 are connected to the hanging platform on the first movable seat 9, and one end of each blocking rod 8 away from the first movable seat 9 is movably inserted in a circulation channel, and the first movable seat 9 is used to drive the blocking rod 8 to move; a driving member 10, a plurality of driving members 10 are arranged on the movable mold assembly 5, and the output ends of the driving members 10 are connected to one side of the first movable seat 9, which is used to drive the first movable seat 9 to move; a first elastic member 11, a plurality of first elastic members 11 are arranged on the movable mold assembly 5, and one end of each first elastic member 11 abuts against the movable mold assembly 5, and the other end abuts against the side of the first movable seat 9 away from the driving member 10, the driving member 10 is preferably a cylinder, and the first elastic member 11 is preferably a spring.

[0040] During the closing process of the two-color injection mold in the present scheme, the first movable seat 9 on the movable mold assembly 5 moves together with the multiple blocking rods 8 mounted thereon, ensuring that the blocking rods 8 are accurately inserted into the circulation channel during the closing process, so that during the first injection molding, the first color of plastic material is prevented from flowing into the second cavity 7 by physical isolation, laying the foundation for subsequent two-color molding. Before the second color of injection molding material is fed, the driving member 10 is activated and applies force to the first movable seat 9 to overcome the resistance generated by the first elastic member 11, thereby driving the blocking rod 8 to withdraw from the circulation channel, and the circulation channel between the first cavity 6 and the second cavity 7 is opened. The second color of injection molding material enters the second cavity 7 and contacts the first part 2 in the first cavity 6, realizing the seamless integration of the first part 2 and the second part 3 of the product 1, and finally obtaining an integrated two-color product 1. In this process, there is no need to rotate or move the mold, which greatly simplifies the operation process and improves production efficiency.

[0041] In order to push the molded product 1 away from the fixed mold assembly 4 , a first push plate 12 is further provided on the fixed mold assembly 4 , which is threadedly connected to the fixed mold assembly 4 through equal-height bolts 13 , and the first push plate 12 movably abuts against the molded product 1 .

[0042] Furthermore, a plurality of mounting grooves 14 are provided on the fixed mold assembly 4, and a second elastic member is provided in each mounting groove 14. One end of the second elastic member abuts against the inner wall of the mounting groove 14, and the other end abuts against the side of the first push plate 12 away from the molded product 1. The second elastic member can be compressed and elastically deformed due to the engagement of the fixed mold assembly 4 and the movable mold assembly 5, and can restore the elastic deformation due to the separation of the fixed mold assembly 4 and the movable mold assembly 5, so as to drive the first push plate 12 to move. The second elastic member is preferably a spring.

[0043] When the two-color injection mold in the present scheme is closed, the second elastic member is compressed and elastically deformed and stores energy due to the tight fit between the fixed mold assembly 4 and the movable mold assembly 5. After the injection molding is completed, as the fixed mold assembly 4 and the movable mold assembly 5 are separated, the compression force on the second elastic member is released, and the second elastic member returns to its original state. The force generated by this recovery process acts on the first push plate 12, causing it to move relative to the fixed mold assembly 4. The first push plate 12 moves to the extreme position, and its end contacts the equal-height bolt 13. At this time, the moving distance or position adjustment of the first push plate 12 is pre-calculated and designed to ensure that the molded product 1 can be completely pushed out of the fixed mold assembly 4 without causing excessive thrust. This design realizes the automation of the demolding step, reduces manual intervention, and improves production efficiency and safety.

[0044] In order to push the molded product 1 away from the movable mold assembly 5 , an ejection assembly is provided on the movable mold assembly 5 .

[0045] Specifically, the ejection assembly includes: a second push plate 15, which is movably arranged in the movable mold assembly 5; a second movable seat 16, which is movably arranged on the movable mold assembly 5 and movably abuts against the molded product 1, and is used to drive the molded product 1 to move; a push rod 17, a plurality of push rods 17 are inserted on the second push plate 15, and one end of each push rod 17 away from the second push plate 15 is inserted on the second movable seat 16, which is used to drive the second movable seat 16 to move. When the mold opening process of the two-color injection mold in this scheme is close to completion and a sufficient gap has been formed between the two molds, the drive device on the injection molding machine is activated to drive the second push plate 15 to move, and then through the linkage of the push rod 17 and the second movable seat 16, the molded product 1 is smoothly ejected from the movable mold assembly 5, ensuring the safety and efficiency of the demolding process.

[0046] Specifically, the feed assembly includes: a hot runner 18, which is arranged in the fixed mold assembly 4 and is used to heat the injection material; a first feed port 19, which is arranged on the end surface of the fixed mold assembly 4, and a first material channel is arranged in the hot runner 18, one end of the first material channel is connected to the first feed port 19, and the other end is connected to the first cavity 6; a second feed port 20, which is arranged on the side of the fixed mold assembly 4 and does not interfere with the first feed port 19, and a second material channel independent of the first material channel is arranged in the hot runner 18, one end of the second material channel is connected to the second feed port 20, and the other end of the second material channel is connected to the second cavity 7.

[0047] When the two-color injection mold in the present scheme is closed, the blocking rod 8 is in the circulation channel, and the feeding assembly performs the first feeding. The injection material of the first color enters the first material channel from the first feed port 19 and flows into the first cavity 6 from the first material channel. After the first injection is completed, the blocking rod 8 withdraws from the circulation channel in time, and then the injection material of the second color enters the second material channel through the second feed port 20, and is smoothly injected into the second cavity 7 and seamlessly combined with the first part 2 material in the first cavity 6, thereby achieving perfect integration of different parts of the product 1. Finally, the two colors of materials are seamlessly integrated in the first part 2 and the second part 3 of the product 1, forming an integrated high-quality two-color product 1.

[0048] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0049] In addition, in the present invention, the descriptions of "first", "second", "one", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0050] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0051] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0052] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the scope defined by the spirit of the present invention.

Claims

1. A two-color injection mold, used for two-color injection molding of a product, wherein the product has a first part and a second part, the first part and the second part are integrally formed, characterized in that: The two-color injection mold comprises: Fixed mold assembly; A movable mold assembly, which is engaged with the fixed mold assembly to form a first cavity and a second cavity, wherein the first cavity is used to form the first part, and the second cavity is used to form the second part; a blocking rod movably arranged on the movable mold assembly, a flow channel being arranged between the first cavity and the second cavity, one end of the blocking rod being movably inserted in the flow channel, the first cavity and the second cavity being isolated from each other by the blocking rod being inserted in the flow channel, and being able to flow with each other by the blocking rod leaving the flow channel; A feeding assembly is arranged on the fixed mold assembly and is used for allowing the two-color injection molding material to enter the first cavity and the second cavity in a preset order.

2. A two-color injection mold as claimed in claim 1, characterized in that: The movable mold assembly is also provided with: A first movable seat is movably arranged on the movable mold assembly, a plurality of the blocking rods are connected to a hanging platform on the first movable seat, and one end of each blocking rod away from the first movable seat is movably inserted into one of the flow channels, and the first movable seat is used to drive the blocking rod to move; A driving member, wherein the movable mold assembly is provided with a plurality of the driving members, and the output ends of the driving members are all connected to the first movable seat, so as to drive the first movable seat to move; A first elastic member, wherein a plurality of the first elastic members are arranged on the movable mold assembly, one end of each of the first elastic members abuts against the movable mold assembly, and the other end abuts against a side of the first movable seat away from the driving member.

3. A two-color injection mold as claimed in claim 1, characterized in that: The fixed die assembly is also provided with a first push plate which is threadedly connected to the fixed die assembly via equal height bolts. The first push plate movably abuts against the molded product to push the molded product away from the fixed die assembly.

4. A two-color injection mold as claimed in claim 3, characterized in that: The fixed mold assembly is also provided with a plurality of mounting grooves, each of which is provided with a second elastic member, one end of the second elastic member abuts against the inner wall of the mounting groove, and the other end abuts against the side of the first push plate away from the molded product. The second elastic member can be compressed and elastically deformed due to the engagement of the fixed mold assembly with the movable mold assembly, and can restore the elastic deformation due to the separation of the fixed mold assembly from the movable mold assembly, so as to drive the first push plate to move.

5. A two-color injection mold as claimed in claim 1, characterized in that: The movable mold assembly is provided with an ejector assembly for ejecting the molded product from the movable mold assembly.

6. A two-color injection mold as claimed in claim 5, characterized in that: The ejection assembly comprises: A second push plate, which is movably disposed in the movable mold assembly; A second movable seat, which is movably disposed on the movable mold assembly and abuts against the molded product, and is used to drive the product to move; A plurality of push rods are inserted on the second push plate, and one end of each push rod away from the second push plate is inserted on the second moving seat to drive the second moving seat to move.

7. A two-color injection mold as claimed in claim 1, characterized in that: The feed assembly comprises: A hot runner, which is arranged in the fixed mold assembly and is used to heat the injection material; A first feed port, which is arranged on the end surface of the fixed mold assembly, wherein a first material channel is arranged in the hot runner, wherein one end of the first material channel is connected to the first feed port, and the other end of the first material channel is connected to the first cavity; A second feed port is arranged on the side of the fixed mold assembly and does not interfere with the first feed port. A second feed channel independent of the first feed channel is arranged in the hot runner, one end of the second feed channel is connected to the second feed port, and the other end of the second feed channel is connected to the second cavity.

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